Milestone 0: import zappier billing, Verae middleware, and Zapier research

Compose-ready workspace: packages/zappier (rate card, portal, Stripe),
packages/verae-zapier-middleware (timestamp + NATS), packages/verae-zapier
(CLI app), vendor/zapier-platform, and research/zapier vendor corpus.

Gate 0 structure checks pass. Product code and research are not yet wired.

research/zapier/docs/diagrams/README.md

@@ -0,0 +1,25 @@
+# Architecture diagrams
+
+SVG sources for [getting-started.md](../../getting-started.md) and `getting-started.pdf`.
+
+| File | What it shows |
+|------|----------------|
+| [01-high-level-architecture.svg](01-high-level-architecture.svg) | End-to-end stack: Zapier cloud, middleware, NATS, workers, Verae, REST Hooks |
+| [02-security-boundaries.svg](02-security-boundaries.svg) | Public HTTPS vs private NATS / store / Verae JWT |
+| [03-auth-two-hop.svg](03-auth-two-hop.svg) | User → middleware tokens; middleware → Verae JWT |
+| [04-flow-async-timestamp.svg](04-flow-async-timestamp.svg) | Create Timestamp + hook sequence |
+| [05-flow-wait.svg](05-flow-wait.svg) | Create and Wait (in-process vs Phase 9 NATS) |
+| [06-nats-topology.svg](06-nats-topology.svg) | Streams, subjects, consumers, ack rules |
+| [07-operations-map.svg](07-operations-map.svg) | Zapier nouns → `/zapier/v1` → Verae |
+| [08-middleware-internals.svg](08-middleware-internals.svg) | Express routes, store, flags |
+| [09-phase-roadmap.svg](09-phase-roadmap.svg) | Gates 0–15 |
+| [10-workspace-integration.svg](10-workspace-integration.svg) | Repo, CLIs, Mongo tunnel, publish vs consume |
+| [11-zapier-billing.svg](11-zapier-billing.svg) | Zapier task plans vs Verae timestamp quotas vs embed |
+| [12-peergos-ipfs-tiered-storage.svg](12-peergos-ipfs-tiered-storage.svg) | Timestamp + Peergos + pin cache + Glacier retrieve-on-demand |
+
+Regenerate:
+
+```bash
+python3 scripts/generate-diagrams.py
+python3 scripts/generate-getting-started-pdf.py
+```